package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;

import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐信息
     * @param setmealDTO
     * @return
     */
    public void save(SetmealDTO setmealDTO){
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //新增套餐信息
        setmealMapper.insert(setmeal);
        //添加套餐和菜品关联信息

        Long SetmealId = setmeal.getId();

        List<SetmealDish> setmealDishList=setmealDTO.getSetmealDishes();

        setmealDishList.forEach(setmealDish -> {
            setmealDish.setSetmealId(SetmealId);
        });

        setmealDishMapper.insert(setmealDishList);

    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        int pageNum = setmealPageQueryDTO.getPage();
        int pageSize = setmealPageQueryDTO.getPageSize();

        PageHelper.startPage(pageNum, pageSize);
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return  new PageResult(page.getTotal(), page.getResult());

    }

    /**
     * 批量删除套餐信息
     * @param ids
     * @return
     */
    public void deleteBatch(List<Long> ids) {
        //判断是否起售，起售中不能删除
        ids.forEach(id->{
            Setmeal setmeal=setmealMapper.getById(id);
            if(setmeal.getStatus()== StatusConstant.ENABLE){
                throw new  DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        //批量删除操作,删除套餐和套餐下的菜品信息
        ids.forEach(id->{
            setmealMapper.deleteById(id);

            setmealDishMapper.deletBySetmealId(id);

        });

    }

    /**
     * 根据id查询套餐信息
     * @param id
     * @return
     */
    public SetmealVO getByIdWithDish(Long id) {
        //获取套餐信息
        Setmeal setmeal = setmealMapper.getById(id);

        //获取套餐和菜品关联信息
        List<SetmealDish> setmealDishes=setmealDishMapper.getBySetmealId(id);
        //封装到SetmealVO对象中
        SetmealVO setmealVO = new SetmealVO();

        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐信息
     * @param setmealDTO
     * @return
     */
    public void update(SetmealDTO setmealDTO) {

        Setmeal setmeal = new Setmeal();

        BeanUtils.copyProperties(setmealDTO,setmeal);

        //修改套餐信息
        setmealMapper.update(setmeal);

        //删除套餐对应的菜品套餐关联信息
        Long setmealId = setmeal.getId();
        setmealDishMapper.deletBySetmealId(setmealId);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        //重新插入套餐对应的菜品套餐关联信息

        setmealDishMapper.insert(setmealDTO.getSetmealDishes());
    }

    /**
     * 套餐的起售停售
     * @param status
     * @param id
     * @return
     */
    public void startOrStop(Integer status, Long id) {


        //判断是起售还是停售
        //起售
        if(status==StatusConstant.ENABLE){
            //判断套餐内是否存在停售菜品
            List<Dish> dishes=dishMapper.getBySetmealId(id);
            if(dishes!=null && dishes.size()>0){
                dishes.forEach(dish -> {
                    if(dish.getStatus()==StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal =Setmeal.builder()
                .status(status)
                .id(id)
                .build();

        setmealMapper.update(setmeal);
    }
}
